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Local pulse wave detection using continuous wave radar systems
Publikationstyp
Conference Paper
Date Issued
2017-12
Sprache
English
TORE-URI
Volume
1
Issue
2
Start Page
81
End Page
89
Article Number
8082495
Citation
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology 2 (1): 8082495 (2017-12)
Publisher DOI
Although a lot of research has been done into radar-based heartbeat detection over the past few years, it is still unknown which physiological effects truly underlie these measurement signals. This paper investigates the cardiovascular system, as well as the effects due to the antenna characteristics, and establishes a connection to the variety of heartbeat signals that can be found in comparable publications. For the first time, the cause of the diverging signal shapes is researched, revealing the locally specific pulse wave curves named sphygmograms. Three different types are investigated: The carotid, the venous, and the ventricle sphygmogram. Verification of the measured signal shapes is ensured by a laser sensor. Afterward, the influence of the filtering on the sphygmograms is researched, as well as the influence of the antenna characteristics on the radar signal. Finally, all novel insights are combined to substantiate the variety of published heartbeat signal curves.
Subjects
Biomedical signal processing
digital signal processing
electromagnetic measurements
radar interferometry
radar signal processing